Impact of foliar application of naphthaleneacetic acid (NAA), boron (B) and gibberllic acid (GA3) on fruit drop, yield and quality attributes of aonla (Emblica officinalis Gaertn. cv. NA-7)

Abstract

The aonla is an important high value indigenous fruit crop an experiment on impact of foliar application of naphthaleneacetic acid (NAA), boron (B) and gibberllic acid (GA3)on fruit drop, yield and quality attributes of aonla (Emblica officinalis Gaertn. cv. NA-7) was conducted at the Horticulture Garden, Chandra Sekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh, India, during 2024. Employing a randomized block design (RBD), with the one-way analysis of variance (ANOVA) the research involved 10 different treatments and 3 replications. Result revealed that the minimum fruit drop (63.47 %) and highest fruit retention (36.53 %) was observed in plants treated with T6 (NAA at 30 ppm). Treatment T8 (GA3 at 50ppm) resulted in a maximum (4.38 cm) length, width of (4.96 cm), highest fruit weight (37.67 g), maximum fruit volume (35.21 cc), highest pulp weight (36.34 g), minimum stone weight (1.32 g), highest pulp: stone ratio (27.43), highest specific gravity (1.07 g/cc) and maximum fruit yield (96.92 kg/plant). The highest total soluble solids (15.16 °Brix), lowest titratable acidity             (1.63 %), maximum ascorbic acid (607.67 mg/100g), highest total sugar (12.97 %) and highest moisture (94.11 %) with the foliar application of T8 (GA₃ at 50 ppm). Thus, the information generated will help to develop the scientific package of practices for aonla cultivation, which in turn will help to improve the economy of farmers.